Why does dry ice make metal scream?

Answer 1

because the ions are reacting with each other. The molecules from the metal which are the metallic atoms and the water molecules are reacting which cause them to vibrate. The reaction can either be pulling the molecules closer or pushing the moleules apart.

Answer 2

First, when warmed, dry ice skips the liquid phase and goes directly to being a gas.

The reason this phenomena happens with metal is because metal is a good conductor of heat and so the temperature difference between the dry ice and the surface remains large. Another way to look at it is that the metal is able to supply a lot of heat quickly to evaporate the dry ice.

When the dry ice sublimates there is a large "source" of gas being created between the two surfaces and it needs to escape. When it is escaping however there is an instability which results in a cyclic motion.

When at first the gas builds up, a space is created. When however the gas speeds up and starts to go throw the space, its pressure drops. This pressure drop happens to all gasses and is called the Bernoulli principle. The dropping pressure of the gas results in the two surfaces coming together again. However that results in another build of gas which pushes the two surfaces apart again. This cycle repeats over and over again.

The cyclic phenomena is in fact very common and is used in the reeds of all wind instruments.

In fact if you press your lips together very tightly and build up the air pressure in your mouth, when the air escapes, a squeaking sound will be created for the same reason. Refer to the related links in the Related Links section below for more information.

Answer 3

metal starts squeaking when it touches the dry ice because the metal is warmer than the dry ice

Answer 4

It does because of the vibrations